Fabry–Pérot resonances and a crossover to the quantum hall regime in ballistic graphene quantum point contacts

• Main Authors: Ahmad, Nurul Fariha, Komatsu, Katsuyoshi, Iwasaki, Takuya, Watanabe, Kenji, Taniguchi, Takashi, Mizuta, Hiroshi, Wakayama, Yutaka, Hashim, Abdul Manaf, Morita, Yoshifumi, Moriyama, Satoshi, Nakaharai, Shu
• Format: Article
• Language: English
• Published: Nature Publishing Group 2019
• Subjects: Q Science (General); T Technology (General)
• Online Access: http://eprints.utm.my/id/eprint/87797/1/NurulFarihaAhmad2019_FabryPerotResonancesandaCrossovertotheQuantumHall.pdf; http://eprints.utm.my/id/eprint/87797/; http://dx.doi.org/10.1038/s41598-019-39909-5

We report on the observation of quantum transport and interference in a graphene device that is attached with a pair of split gates to form an electrostatically-defined quantum point contact (QPC). In the low magnetic field regime, the resistance exhibited Fabry–Pérot (FP) resonances due to np’n(pn’...